#! /bin/sh
# $OpenLDAP$
## This work is part of OpenLDAP Software <http://www.openldap.org/>.
##
## Copyright 1998-2022 The OpenLDAP Foundation.
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted only as authorized by the OpenLDAP
## Public License.
##
## A copy of this license is available in the file LICENSE in the
## top-level directory of the distribution or, alternatively, at
## <http://www.OpenLDAP.org/license.html>.

echo "running defines.sh"
. $SRCDIR/scripts/defines.sh

ITS=9288
ITSDIR=$DATADIR/regressions/its$ITS

if test $BACKLDAP = "ldapno" ; then
	echo "LDAP backend not available, test skipped"
	exit 0
fi

mkdir -p $TESTDIR $DBDIR1 $DBDIR2
cp -r $DATADIR/tls $TESTDIR

echo "This test checks that back-ldap does not crash when proxy retries "
echo "connection to remote server and the retry fails with an LDAP error."

#
# Start slapd that acts as a remote LDAP server that will be proxied
#
echo "Running slapadd to build database for the remote slapd server..."
. $CONFFILTER $BACKEND < $CONF > $CONF1
$SLAPADD -f $CONF1 -l $LDIFORDERED

RC=$?
if test $RC != 0 ; then
	echo "slapadd failed ($RC)!"
	exit $RC
fi


echo "Starting remote slapd server on TCP/IP port $PORT1..."
$SLAPD -f $CONF1 -h "$URI1" -d $LVL > $LOG1 2>&1 &
SERVERPID=$!
if test $WAIT != 0 ; then
	echo SERVERPID $SERVERPID
	read foo
fi

sleep $SLEEP0

echo "Using ldapsearch to check that slapd is running..."
for i in 0 1 2 3 4 5; do
	$LDAPSEARCH -s base -b "$MONITOR" -H $URI1 \
		'objectclass=*' > /dev/null 2>&1
	RC=$?
	if test $RC = 0 ; then
		break
	fi
	echo "Waiting $SLEEP1 seconds for slapd to start..."
	sleep $SLEEP1
done

#
# Start ldapd that will proxy for the remote server
#
echo "Starting slapd proxy on TCP/IP port $PORT2..."
. $CONFFILTER $BACKEND < $ITSDIR/slapd-proxy.conf > $CONF2
$SLAPD -f $CONF2 -h $URI2 -d $LVL > $LOG2 2>&1 &
PROXYPID=$!
if test $WAIT != 0 ; then
	echo PROXYPID $PROXYPID
	read foo
fi
KILLPIDS="$KILLPIDS $PROXYPID"

sleep $SLEEP0

echo "Using ldapsearch to check that slapd is running..."
for i in 0 1 2 3 4 5; do
	$LDAPSEARCH -s base -b "$MONITOR" -H $URI2 \
		'objectclass=*' > /dev/null 2>&1
	RC=$?
	if test $RC = 0 ; then
		break
	fi
	echo "Waiting $SLEEP1 seconds for slapd to start..."
	sleep $SLEEP1
done

#
# Test case:
#
#   1. Client establishes connection to proxy and binds
#   2. Proxy establishes connection to remote server and passes through the bind.
#   3. Change the user password on the remote server
#   4. Kill and restart the remote server to invalidate the TCP connection between proxy and remote
#   5. Make a new search from client
#   6. Proxy notices connection is down and retries bind (rebind-as-user)
#   7. Server responds with error: invalid credentials
#   8. Proxy crashes
#

# Create fifo that is used to pass searches from the test case to ldapsearch without
# disconnecting the client -> proxy connection
rm -f $TESTDIR/ldapsearch.fifo
mkfifo $TESTDIR/ldapsearch.fifo

# Start ldapsearch on background and have it read search filters from fifo,
# so that single client connection will persist over many searches
echo "Make the proxy to connect the remote LDAP server..."
$LDAPSEARCH -b "$BASEDN" -H $URI2 \
	-D "$BABSDN" -w "bjensen" \
	-f $TESTDIR/ldapsearch.fifo > $TESTOUT 2>&1 &
LDAPSEARCHPID=$!
KILLPIDS="$KILLPIDS $LDAPSEARCHPID"

# Open fifo as file descriptor
exec 3>$TESTDIR/ldapsearch.fifo

# Trigger LDAP connections towards the proxy by executing a search￼
echo 'objectclass=*' >&3

echo "Change user's bind password on the remote server in order to make rebind-as-user fail when proxy retries"
$LDAPPASSWD -H $URI1 -D "$MANAGERDN" -w $PASSWD \
	-s "newpass" "$BABSDN" >> $TESTOUT 2>&1
RC=$?
if test $RC != 0 ; then
	echo "ldappasswd failed ($RC)!"
	test $KILLSERVERS != no && kill -HUP $KILLPIDS $SERVERPID
	exit $RC
fi

# Restart the remote server to invalidate TCP connection between proxy and remote
echo "Killing and Re-starting remote slapd server on TCP/IP port $PORT1..."
kill -HUP $SERVERPID
wait $SERVERPID

$SLAPD -f $CONF1 -h "$URI1" -d $LVL >> $LOG1 2>&1 &
SERVERPID=$!
if test $WAIT != 0 ; then
	echo SERVERPID $SERVERPID
	read foo
fi
KILLPIDS="$KILLPIDS $SERVERPID"

sleep $SLEEP0

echo "Using ldapsearch to check that slapd is running..."
for i in 0 1 2 3 4 5; do
	$LDAPSEARCH -s base -b "$MONITOR" -H $URI1 \
		'objectclass=*' > /dev/null 2>&1
	RC=$?
	if test $RC = 0 ; then
		break
	fi
	echo "Waiting $SLEEP1 seconds for slapd to start..."
	sleep $SLEEP1
done

echo "Make new ldap search to trigger proxy retry logic"
echo 'objectclass=*' >&3

sleep $SLEEP0
echo "Checking if proxy slapd is still up"
$LDAPSEARCH -s base -b "$MONITOR" -H $URI1 \
	'objectclass=*' > /dev/null 2>&1
RC=$?
if test $RC != 0 ; then
	echo "slapd crashed!"
	test $KILLSERVERS != no && kill -HUP $KILLPIDS 2>/dev/null
	exit $RC
fi

test $KILLSERVERS != no && kill -HUP $KILLPIDS 2>/dev/null

echo ">>>>> Test succeeded"

test $KILLSERVERS != no && wait

exit 0
